A college student, usually female, whose undergraduate experience is focused on becoming engaged/married. She may have applied to colleges based on the social pool she expects to marry from, and she conducts college activities (from course selection to extracurriculars) with an eye toward identifying and connecting with a suitable partner.
Compare to: pre-law, pre-med (undergraduate students who already plan to go on to graduate school in law or medicine).
A lot of the students here have already planned out their whole futures. John is pre-med, Sally is pre-law, and Natalie is pre-wed. She's really serious about it, too -- she spends an hour every morning getting ready for class.